Wheelchair seating system including trapezoidally sectioned flui

Details Wheelchair seating system including trapezoidally sectioned flui Wheelchair seating system including trapezoidally sectioned flui

1998-04-24

1999-08-10

Grosz, Alexander

Beds

Support for users body or part thereof

Removable support specially adapted for seating

29745241, 29745224, A47C 2718, A47C 702

Patent

active

059338911

ABSTRACT:
The present invention relates to a seat cushion assembly for use, in particular, in a wheelchair. The assembly includes a sculpted or molded foam base having exterior sidewalls profiled to accommodate a wheelchair frame, and a seating surface to provide some positioning support to the occupant. Further, the base includes a well area to be positioned under the ischial tuberosities of the occupant and including means for the removable attachment of a flexible envelope containing a fluid filling material. The envelope is comprised of upper and lower elastomeric sheet materials sealed about the perimeter. It is divided by internal seal sections so as to inhibit fluid migration within the envelope. These internal seals define a tapering flow orifice which provide for gradual restriction of a flow channel to permit flow so as to avoid failure inhibiting fluid migration. The envelope has a surface area which exceeds the surface area of the well and includes attachment means on the bottom side to encourage a gathering of the envelope into the well for proper cushioning effect. In addition, the assembly can include a rigidizer to enable the cushion to be used in a sling-type wheelchair seat.

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